US Bridges

I-79 Nbl over CR 29

Fair

Roane County, West Virginia · 2.33 Mile South of CR 29 · Structure no. 00000000044A122

Built
1972
53 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
159 ft
1 main span
Daily traffic
5,800
2019 count
Owner
State
State Highway Agency

About this bridge

I-79 Nbl over CR 29 is a steel continuous stringer/multi-beam or girder carrying I-79 Nbl over CR 29 in Roane County, West Virginia. It was built in 1972, so it is 53 years old, older than the West Virginia average of 44.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,800 vehicles a day, roughly 16% of them trucks, projected to reach 8,294 by 2039. The structure is 159 ft (48.5 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesI-79 Nbl
CrossesCR 29
Location2.33 Mile South of CR 29
RouteInterstate 79
CountyRoane County
StateWest Virginia
Coordinates38.54812, -81.30022
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length159 ft (48.5 m)
Longest span61 ft (18.6 m)
Deck width45 ft (13.6 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,800 (2019)
Projected traffic8,294 by 2039
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$716,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-79 Nbl over CR 29 built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-79 Nbl over CR 29 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does I-79 Nbl over CR 29 carry?

About 5,800 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is I-79 Nbl over CR 29?

The structure is 159 ft (48.5 m) long with a longest span of 61 ft (18.6 m) and a deck 45 ft wide.

Who owns I-79 Nbl over CR 29?

It is owned by the State Highway Agency.